Thanks to its in-mould construction, the Vertice is extremely lightweight. The sophisticated size adjustment is done in two steps: The Dial Fit System simply adjusts the inside of the helmet to the shape of your head, while the Tune Fit System allows for additional fine-tuning, as the helmet is equipped with comfort pads of different thicknesses that allow you to adjust the fit on the inside of the helmet. Ventilation channels provide breathability and fresh airflow to the scalp. This is the perfect model for anyone looking for a stylish, easy-to-use and feather-light helmet! Tuned Fit System The Tuned Fit System allows for easy adjustment of the fit with Comfort Pads of different thicknesses. These can be easily attached to the inside of the helmet using the hook and loop closure. Two different sizes are included with the helmet. FeaturesLow FitSnug FitTuned Fit System12 aerodynamic ventsComfort upholstery kit in 2 sizesCE EN 1077, ASTM 2040